package com.lagou.dao.impl;

import com.lagou.dao.CourseDao;
import com.lagou.pojo.Course;
import com.lagou.utils.DruidUtils;
import org.apache.commons.dbutils.QueryRunner;
import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;

import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

/**
 * @description: 课程模块 DAO层实现类
 * @author: zhuxiang
 * @create: 2020-07-27 09:19
 **/
public class CourseDaoImpl implements CourseDao {
    //查询课程列表信息
    @Override
    public List<Course> findCourseList() {
        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            //2.编写SQL 判断是否删除 取出is_del = 0 的数据，未删除的数据
            String sql = "select id,course_name,price,sort_num,status from course where is_del = ?";
            //3.执行查询
            List<Course> list = qr.query(sql, new BeanListHandler<Course>(Course.class), 0);
            return list;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //根据条件查询课程信息
    @Override
    public List<Course> findByCourseNameAndStatus(String courseName, String status) {

        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写SQL 当前的查询为多条件不定项查询
            //2.1 创建StringBuffer 对象，将SQL字符串 添加进缓冲区
            StringBuffer sb = new StringBuffer("select id,course_name,price,sort_num,status from course where 1=1 and is_del = ?");

            //2.2 创建list集合 保存参数
            List<Object> list = new ArrayList<>();
            list.add(0);

            //2.3 判断传入的参数是否为空
            if (courseName != null && !courseName.equals("")){
                sb.append(" and course_name like ?");
                //将条件放进list集合
                list.add("%"+courseName+"%");
            }
            if (status != null && !status.equals("")){
                sb.append(" and status = ?");
                //将status 转换为 int
                int i = Integer.parseInt(status);
                list.add(i);
            }

            //执行查询
            List<Course> list1 = qr.query(sb.toString(), new BeanListHandler<Course>(Course.class), list.toArray());
            return list1;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //保存课程营销信息
    @Override
    public int saveCourseSalesInfo(Course course) {

        try {
            //1.创建QueryRunner
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            //2.编写SQL
            String sql = "insert into course (course_name," +
                    "brief,teacher_name,teacher_info,preview_first_field," +
                    "preview_second_field,discounts,price,price_tag," +
                    "share_image_title,share_title,share_description," +
                    "course_description,course_img_url,status,create_time,update_time)" +
                    "values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

            //3.准备参数
            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                    course.getPreview_first_field(),course.getPreview_second_field(),
                    course.getDiscounts(),course.getPrice(),course.getPrice_tag(),
                    course.getShare_image_title(),course.getShare_title(),
                    course.getShare_description(),course.getCourse_description(),
                    course.getCourse_img_url(),course.getStatus(),course.getCreate_time(),
                    course.getUpdate_time()};

            //执行插入操作
            int update = qr.update(sql, param);
            return update;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    //根据ID查询课程信息
    @Override
    public Course findCourseById(int id) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            String sql = "select id," +
                    " course_name," +
                    "brief," +
                    "teacher_name," +
                    "teacher_info," +
                    "preview_first_field," +
                    " preview_second_field," +
                    "discounts," +
                    "price," +
                    "price_tag," +
                    " share_image_title," +
                    "share_title," +
                    "share_description," +
                    " course_description," +
                    "course_img_url," +
                    "status from course where id = ?";
            Course course = qr.query(sql, new BeanHandler<Course>(Course.class), id);
            return course;
        } catch (SQLException e) {
            e.printStackTrace();
            return null;
        }
    }

    //修改课程营销信息
    @Override
    public int updateCourseSalesInfo(Course course) {
        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());
            String sql = "UPDATE course SET \n" +
                    "course_name = ?,\n" +
                    "brief = ?,\n" +
                    "teacher_name = ?,\n" +
                    "teacher_info = ?,\n" +
                    "preview_first_field = ?,\n" +
                    "preview_second_field = ?,\n" +
                    "discounts = ?,\n" +
                    "price = ?,\n" +
                    "price_tag = ?,\n" +
                    "share_image_title = ?,\n" +
                    "share_title = ?,\n" +
                    "share_description = ?,\n" +
                    "course_description = ?,\n" +
                    "course_img_url = ?,\n" +
                    "update_time = ? \n" +
                    "WHERE id = ?";
            Object[] param = {course.getCourse_name(),course.getBrief(),course.getTeacher_name(),course.getTeacher_info(),
                    course.getPreview_first_field(),course.getPreview_second_field(),course.getDiscounts(),course.getPrice(),course.getPrice_tag(),
                    course.getShare_image_title(),course.getShare_title(),course.getShare_description(),course.getCourse_description(),
                    course.getCourse_img_url(),course.getUpdate_time(),course.getId()};
            int update = qr.update(sql, param);
            return update;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }

    //修改课程状态
    @Override
    public int updateCourseStatus(Course course) {

        try {
            QueryRunner qr = new QueryRunner(DruidUtils.getDataSource());

            String sql = "UPDATE course SET STATUS = ? ,update_time = ? WHERE id = ?";

            Object[] param = {course.getStatus(),course.getUpdate_time(),course.getId()};
            int row = qr.update(sql, param);
            return row;
        } catch (SQLException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
